Regulation of the reaction gas to water vapor ratio in the converter
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This post was last edited by 654262293 on 2010-11-24 08:42. Below are two methods for adjusting the water-vapor ratio; what are the advantages and disadvantages of each method? Thank you. First method: Adjust the water-to-gas ratio before feeding it into the converter ； Second method: Introduce steam while introducing air to adjust the water-to-vapor ratio ；
It should be by releasing air while adjusting the gas-to-air ratio; how can the gas-to-air ratio be adjusted without releasing air?
We introduce the feed gas while adding steam; I’ve never seen it being introduced to the shift converter after it’s been prepared ?
Reply to 2# Yan Qiusheng: Could we adjust the gas ratio first, then vent it in front of the converter, and gradually open the valve to introduce the gas?
There is no need to do this; it will result in waste.
The amount of steam introduced is adjusted according to the production load. The gas-to-gas ratio refers to the ratio between these two gases; generally, the steam supply should be adjusted based on the amount of feed gas. If too much steam is used, it leads to higher consumption and is also harmful to the catalyst. Therefore, the gas-to-gas ratio should be adjusted according to the quantity of feed gas, and steam should be added after that adjustment, that is, the adjustment is made after introducing gas.
The last edit to this post was made by 654262293 on 2010-11-24 08:43. Reply to 3# Kuju Kaisshi: The gas production process uses water-coal slurry; no external steam is required for the shift system. The water vapor in the water-gas mixture comes from the gasification process, and it is prepared directly. The ratio of water to gas depends on the pressure and temperature of the water-gas mixture!
This post was last edited by 654262293 on 2010-11-24 08:50. The shift process using additional steam generally involves adjusting the hydrogen-to-carbon monoxide ratio while introducing gas. However, there is one problem: when dealing with the shift of water gas containing high levels of carbon monoxide, more steam is usually required to remove the heat generated by the shift reaction; this often leads to overheating of the shift reactor due to untimely adjustment of the water vapor ratio during gas introduction!
I think it is feasible. In the shift process using the powder coal gasification technology, the peak temperature in the shift reactor can easily exceed the limit during gas introduction; by pre-setting the hydrogen-to-air ratio, although some steam is wasted, the advantages outweigh the disadvantages!
The shift reaction gas supply should have the water-to-gas ratio adjusted according to the bed temperature; especially for gas with a high CO concentration, the amount of shift reaction is controlled by regulating the steam volume in order to prevent overheating.